Blues had 4 forwards put up 40 points or more.
Top 10 teams in scoring in 18-19
Tampa - 7 forwards with 40+ points, 6 with 45+, 3 with 50+ points
Calgary - 5 forwards with 40+ points, 5 with 45+, 4 with 50+ points
San Jose - 7 forwards with 40+ points, 7 with 45+, 7 with 50+ points
Toronto - 7 forwards with 40+ points, 3 with 45+, 3 with 50+ points
Washing. - 7 forwards with 40+ points, 6 with 45+, 4 with 50+ points
Pittsburgh - 4 forwards with 40+ points, 4 with 45+, 4 with 50+ points
Winnipeg - 5 forwards with 40+ points, 4 with 45+, 4 with 50+ points
Chicago - 5 forwards with 40+ points, 5 with 45+, 4 with 50+ points
Florida - 4 forwards with 40+ points, 4 with 45+, 4 with 50+ points
Colorado - 5 forwards with 40+ points, 4 with 45+, 3 with 50+ points
Just a guess, but teams having high 30's to low 40s points on their 2nd line is probably more common that not.
Only so many points (and so much PP time) to go around.